A5 chip/Older iOS device compatibility

Hi all,

Can anybody offer any advice about running an app on older iOS devices?

My app crashes on the older iPad Mini, but runs ok on 4th gen ipad, and also fine on iPad AIR family, so there's not a 32-bit/64-bit issue as such.

Could it be an issue with the older

Th A5 chip in the mini?

Frustratingly, there's no helpful output in Xcode when I build - no error messages, just drops out at the loading screen.

Getting way behind on my project now. Client grumbling so any help would be gratefully recieved.

Thanks